EN IEC 60034-27-2:2024

Rotating electrical machines - Part 27-2: On-line partial discharge measurements on the stator winding insulation

IEC 60034-27-2:2023 deals with on-line PD measurements and provides a common basis with standardized procedures if possible for: - measuring techniques and instruments; - the arrangement of the installation; - normalization and sensitivity assessment; - measuring procedures; - noise reduction; - the documentation of results; - the interpretation of results; with respect to partial discharge on-line measurements on the stator winding insulation of non‑converter driven rotating electrical machines with rated voltage of 3 kV and up. This document covers PD measuring systems and methods detecting electrical PD signals. The same measuring devices and procedures can also be used to detect electrical sparking and arcing phenomena.

Drehende elektrische Maschinen - Teil 27-2: Online Teilentladungsmessungen an der Ständerwicklungsisolierung drehender elektrischer Maschinen

Machines électriques tournantes - Partie 27-2: Mesurages en fonctionnement des décharges partielles effectués sur le système d’isolation

IEC 60034-27-2:2023 traite des mesurages en fonctionnement des DP et fournit une base commune avec, lorsque c’est possible, des procédures normalisées pour: - les techniques et les appareils de mesure; - la mise en place de l’installation; - l'évaluation de la normalisation et de la sensibilité; - les procédures de mesure; - la réduction du bruit; - la documentation des résultats; - l'interprétation des résultats; pour les besoins des mesurages en fonctionnement des décharges partielles sur le système d'isolation des enroulements statoriques des machines électriques tournantes non entraînées par convertisseur, avec une tension assignée supérieure ou égale à 3 kV. Le présent document couvre les systèmes de mesure des DP et les méthodes de détection des signaux de DP électriques. Les mêmes appareils et procédures de mesure peuvent également être utilisés pour détecter les phénomènes d’étincelles et d’arc électriques.

Električni rotacijski stroji - 27-2 del: Spletne meritve delne izpraznitve na izolaciji statorskih navitij neaktivnih električnih rotacijskih strojev

General Information

• Status: Published
• Publication Date: 18-Jan-2024
• ICS: 29.160.01 - Rotating machinery in general
• Technical Committee: CLC/TC 2 - Rotating machinery
• Drafting Committee: IEC/TC 2 - IEC_TC_2
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 19-Jan-2024
• Due Date: 31-Aug-2021
• Completion Date: 19-Jan-2024
• Ref Project: kSIST FprEN IEC 60034-27-2:2023 - Rotating electrical machines - Part 27-2: On-line partial discharge measurements on the stator winding insulation of rotating electrical machines

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 60034-27-2:2022
01-julij-2022
Električni rotacijski stroji - 27-2 del: Spletne meritve delne izpraznitve na izolaciji
statorskih navitij neaktivnih električnih rotacijskih strojev
Rotating electrical machines - Part 27-2: On-line partial discharge measurements on the
stator winding insulation of rotating electrical machines
Ta slovenski standard je istoveten z: prEN IEC 60034-27-2:2022
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
oSIST prEN IEC 60034-27-2:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60034-27-2:2022

oSIST prEN IEC 60034-27-2:2022
2/2099/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-27-2 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-06-03 2022-08-26
SUPERSEDES DOCUMENTS:
2/2070/CC, 2/2072/DTS
IEC TC 2 : ROTATING MACHINERY
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any, in this
CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of CENELEC,
is drawn to the fact that this Committee Draft for Vote (CDV) is
submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are aware
and to provide supporting documentation.

TITLE:
Rotating electrical machines – Part 27-2: On-line partial discharge measurements on the stator winding insula-
tion of rotating electrical machines

PROPOSED STABILITY DATE: 2025
NOTE FROM TC/SC OFFICERS:
This project was changed from TS into an IS, IEC 60034-27-2 ED1, as per documents 2/2086/Q and 2/2093/RQ.

electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

oSIST prEN IEC 60034-27-2:2022
– 2 – IEC CDV 60034-27-2 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 2
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Cause and effects of on-line PD . 6
5 Noise and disturbances . 7
General . 7
Noise and disturbance sources . 7
6 Measuring techniques and instruments . 8
General . 8
Pulse propagation in windings . 8
Signal transfer characteristics . 9
PD sensors . 12
General . 12
Design of PD sensors . 12
Reliability of PD sensors . 13
PD measuring device . 13
PD measuring parameters . 13
General . 13
PD magnitude . 13
Additional PD parameters . 14
7 Installation of measuring systems . 14
General . 14
Installation of PD sensors . 14
Outside access point and cabling . 15
Installation of the PD measuring device . 15
Installation of operational data acquisition systems . 16
8 Normalization of measurements . 16
General . 16
Normalization for low frequency systems . 16
General . 16
Normalization procedure . 17
Normalization / sensitivity check for high and very high frequency systems . 18
Specification for the electronic pulse generation . 18
Configuration of the machine . 19
Sensitivity check . 19
9 Measuring procedures . 19
General . 19
Machine operating parameters . 20
Baseline measurement . 20
General . 20
Comprehensive test procedure . 20
Periodic measurements . 21
Continuous measurements . 22

oSIST prEN IEC 60034-27-2:2022
IEC CDV 60034-27-2 © IEC 2022 – 3 –
10 Visualization of measurements . 22
General . 22
Visualization of trending parameters . 22
Visualization of PD patterns . 23
11 Interpretation of on-line measurements. 26
General . 26
Evaluation of basic trend parameters. 26
Evaluation of PD patterns . 27
General . 27
PD pattern interpretation . 27
Effect of machine operating factors . 28
General . 28
Machine operating factors . 28
Steady state load conditions . 29
Transient load conditions . 29
12 Test report. 30
Annex A (informative) Nature of PD in rotating electrical machines . 33
A.1 Types of PD in rotating electrical machines . 33
A.1.1 General . 33
A.1.2 Internal discharges . 33
A.1.3 Slot discharges . 33
A.1.4 Discharges in the end-winding . 34
A.1.5 Conductive particles . 34
A.2 Arcing and sparking . 34
A.2.1 General . 34
A.2.2 Arcing at broken conductors . 34
A.2.3 Vibration sparking . 34
Annex B (informative) Disturbance rejection and signal separation . 35
B.1 General . 35
B.2 Frequency domain separation . 35
B.3 Time domain separation . 35
B.4 Combination of frequency and time domain separation . 36
B.5 Synchronous multi-channel measurement . 37
B.6 Signal gating . 37
B.7 Pattern recognition . 38
Annex C (informative) Examples of Phase Resolved Partial Discharge (PRPD) pattern. 40
C.1 General . 40
C.2 Principal appearance of phase resolved PD patterns . 40
C.3 Example of typical PRPD patterns recorded in laboratory . 42
C.3.1 General . 42
C.3.2 Internal discharges . 42
C.3.3 Slot partial discharges . 44
C.3.4 Discharges in the end-winding . 45
C.4 Example of typical PRPD patterns recorded on-line . 47
C.4.1 General . 47
C.4.2 Internal discharges . 47
C.4.3 Slot partial discharges . 49
C.4.4 Discharges in the end-winding . 50

oSIST prEN IEC 60034-27-2:2022
– 4 – IEC CDV 60034-27-2 © IEC 2022
C.5 Other complex examples . 53
Annex D (normative) Specifications for conventional PD coupling capacitors . 55
D.1 General . 55
D.2 Datasheet information . 55
D.3 Type tests . 55
D.3.1 Voltage endurance . 55
D.3.2 Tracking resistance? . 55
D.3.3 Lightning impulse test . 55
D.3.4 Dissipation factor .
...